Anu Light needed a true heart first before taking the second step, which was to remain free under the challenges of life. That was the state that Anu Light swordsmen started to create their Forge of Flame. Once they got their foundation with Steel of Will, they experienced life and stayed true to their 'freedom'.
The experience created a forge inside them. A forge that could be used to shape that steel.
Mirage Blade needed obsession to step on its first rank. To become the greatest, obsession was necessary.
But after obsession, came boredom, failure and desperation. Only by hanging on to your devotion, that the practitioner of the Mirage Blade went past this stage and created their own Forge.
Regulus succeeded in two but he didn't understand why he did it. Until Siderius told him about his purpose. That was to be the best.
Anu Light craved a life of no regret so it needed the swordsmen to stay on that road.
